Wednesday, September 11, 2013

Micros Macros, Deny the Factos

The last but not least, the end of Frame 7-A.

The original mistaken idea of macroevolution was that a "super" mutation, or "saltation" could produce huge viable alterations in a species in one generation. Hugo de Vries’s (1848-1935) was an early proponent of "mutation theory," which supposed that macro mutations, not Darwinian gradualism, led to the appearance of new species. This has been long rejected. The last scientist to promote such a notion was probably Richard Goldshmidt in the 1940s.

Current paleontologists, particularly Douglas Erwin and Robert Carroll, use the term but radically redefined. Their use is to indicate a shift in focus from the individual's expression of a new inherited mutation which they call "microevolution" to the evolutionary arc over hundreds, or thousands of generations and the accumulation of hundreds or thousands of mutations. The evolutionary change they are considering are between the taxonomic categories of "family" or even "phyla." Erwin and Valentine (2013) expanded their usage of "macroevoltution" even further to incorporate ideas of how geological, and ecological factors act independently and together to shape the adaptive landscape. In this application, "macroevolution" added natural events totally unrelated to genetics, or development. Valentine offered this definition in his 2004 book "On the Origin of Phyla," "Used here for evolutionary processes that do not involve changes in the frequency of structural genes, and includes gene regulatory evolution and patterns and rates of speciation and extinction." That is freaking incoherent. Robert Carroll hardly bothers with a definition, merely saying that "Macroevolution: evolution above the level of species," and "Microevolution: evolution at the level of populations and species." Obviously none of these scientists are suggesting a rejection of evolutionary theory. Why their distinctions of various sorts of evolution are pointless deserves an extended discussion elsewhere.

The notion that we have some sort of problem demonstrating 'macro' evolution is a joke. How can creationists deny the fact that we have directly observed the "Emergence of New Species." This is as "MACRO" as macro gets.

For a selection of books directly related to this area, see;

Carroll, Robert L.
1998 'Patterns and Processes of Vertebrate Evolution' New York: Cambridge University Press,


Valentine, James W.
2005 On the Origin of Phyla University of Chicago Press (Professor Valentine's book is probably the best study of the pre-Cambrian, and Cambrian eras available in English).

For non-scientists I recommend;

Carroll, Sean B.
2005 'Endless Forms Most Beautiful' New York: Norton


Shubin, Neal
2008 Your Inner Fish New York: Pantheon Books

But, none of these notions bare any resemblance to the creationist's warped presentations of these ideas. One popular definition is that a creationist calls "micro-evolution" all the evolution they cannot deny without appearing stupid, and "macro-evolution" is all the evolution that they are afraid is true. Most creationists these days will admit that "there is limited change within kinds," but still deny the origin of new species from older ones. Betraying the creationist anxiety about human evolution, they all deny that "a non-human gave birth to a human being."

The failures of the creationist attempt to reconcile their magical thinking with science are easy to point out. First, they cannot define their idea of "Kind." What is a "Kind?" Second, what is the creationist's argument that normal evolutionary processes which they admit normally occur are somehow blocked from their only logical result? What does a creationist taxonomy look like? What is the genetic barrier to speciation?
They can try by faking a sloppy, and inconsistent version of "kinds" substituted for species. This is the so-called creation science of "baraminology."